A:
Positive:
1 x 151404555 x 302809111 x 137640517 x 89061555 x 27528185 x 178123187 x 80965935 x 16193
Negative:
-1 x -15140455-5 x -3028091-11 x -1376405-17 x -890615-55 x -275281-85 x -178123-187 x -80965-935 x -16193
Unfortunately, there's not simple formula to identifying all of the factors of a number and it can be a tedious process when trying to identify the divisors of larger numbers. To find the factor combinations of the number 15,140,455, it is easier to work with a table - it's called factoring from the outside in.
We start by creating a table and writing 1 on the left side and then the number we're trying to find the factors for on the right side in a table. Then, below that, write the numbers as a negative as well.
| 1 | 15,140,455 | |
| -1 | -15,140,455 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,140,455.
Example:
1 x 15,140,455 = 15,140,455
and
-1 x -15,140,455 = 15,140,455
Notice both answers equal 15,140,455
With that explanation out of the way, let's continue. Next, we take the number 15,140,455 and divide it by 2:
15,140,455 ÷ 2 = 7,570,227.5
If the quotient is a whole number, then 2 and 7,570,227.5 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 15,140,455 | |
| -1 | -15,140,455 |
Now, we try dividing 15,140,455 by 3:
15,140,455 ÷ 3 = 5,046,818.3333
If the quotient is a whole number, then 3 and 5,046,818.3333 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 15,140,455 | |
| -1 | -15,140,455 |
Let's try dividing by 4:
15,140,455 ÷ 4 = 3,785,113.75
If the quotient is a whole number, then 4 and 3,785,113.75 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 15,140,455 | |
| -1 | 15,140,455 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 17 | 55 | 85 | 187 | 935 | 16,193 | 80,965 | 178,123 | 275,281 | 890,615 | 1,376,405 | 3,028,091 | 15,140,455 |
| -1 | -5 | -11 | -17 | -55 | -85 | -187 | -935 | -16,193 | -80,965 | -178,123 | -275,281 | -890,615 | -1,376,405 | -3,028,091 | -15,140,455 |
Here are some more numbers to try:
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